The KIAA1549 gene helps support normal cell activity, especially in the brain. Some changes involving this gene can disturb the signals that tell cells when to grow. In medicine, this gene is important because part of it can sometimes join with the BRAF gene. That KIAA1549-BRAF fusion is linked to pilocytic astrocytoma, a usually slow growing brain tumor often found in children and young adults.
What is a gene?
A gene is a stretch of DNA that carries instructions your cells use to make molecules or regulate processes in the body. Some genes provide the information needed to produce proteins, the parts of cells that do the work. Other genes mainly help determine when and where certain processes take place, and how strongly they operate. Together, genes affect how the body develops and works, and they can influence how you respond to food, stress, or medications. For a more detailed look at this topic, you can read more in the LearnHub.
Overview
KIAA1549Gene function
What if the gene works
The KIAA1549 gene makes a protein that is especially active in the brain. It may help support normal cell signaling and development.
Risk
What if the gene does not work
Variants can range from milder to more severe and may reduce how much protein the KIAA1549 gene helps cells make or how well that protein works. This can alter normal protein interactions and cell signaling pathways.
Treatment
What does that mean for your treatment
No KIAA1549-specific treatment or drug selection approach is currently established for pathogenic or loss-of-function variants in the KIAA1549 gene. In research and cancer care, KIAA1549 is better known as part of the KIAA1549-BRAF fusion, which can help classify some brain tumors and may support use of drugs that target the MAPK pathway.
Conditions associated with KIAA1549
Gene function
What if the gene works
In everyday cell life, the KIAA1549 gene provides instructions for a protein that is made in several tissues, including the brain. This normal function of the KIAA1549 gene is part of steady cell activity and tissue maintenance.
The KIAA1549 gene tells cells how to make the KIAA1549 protein. This protein is produced during normal cell growth and upkeep, especially in brain tissue.
What is a variant?
A genetic variant is a small change in a gene’s DNA sequence. These changes are common and contribute to normal human diversity, including differences in appearance, metabolism, and the way the body responds to environmental influences. Many variants do not have any noticeable effect and are simply part of natural genetic variation. Sometimes, however, a variant changes how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the KIAA1549 gene can affect function in different ways, depending on whether the DNA change is small or part of a larger rearrangement. Some variants may alter the protein’s shape, stability, or how it interacts with other proteins, which can reduce or change its activity. Larger rearrangements can create a KIAA1549-BRAF fusion, which keeps cell growth signaling more active than usual. Milder changes may have subtler effects, while more disruptive variants can have a stronger cellular impact.
How variants are linked to conditions
Changes involving the KIAA1549 gene are best known in a usually low grade brain tumor called pilocytic astrocytoma, where a KIAA1549::BRAF fusion involving the BRAF gene is commonly found. This is usually a tumor-specific change rather than an inherited finding passed through families. On its own, the KIAA1549 gene does not have a broadly confirmed link to a separate inherited syndrome. In practice, KIAA1549 gene variants and health conditions are mainly discussed in the setting of this specific tumor finding.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are common across the general population. Most do not directly affect health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when several genes and environmental factors play a role. In some situations, though, a single well-characterized variant in a specific gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
There is not yet broadly confirmed evidence on specific factors that increase or reduce health risk related to KIAA1549 itself. Anyone with concerns about personal or family risk should speak with a doctor or genetic counselor.
Inheritance of KIAA1549 variants
There is not yet a broadly confirmed disease specific KIAA1549 inheritance pattern for inherited conditions, and this understanding can change as research develops. The KIAA1549 gene is located on chromosome 7, which is an autosome. That means each person usually inherits one copy of the KIAA1549 gene from their mother and one copy from their father.
What does my KIAA1549 result mean for my family?
There is not yet a broadly confirmed inherited pattern tied to a specific health condition for KIAA1549. If you have a KIAA1549 result and want to understand what it could mean for your relatives, a doctor or genetic counselor can help explain it in the context of your exact finding.
Genetic information
Genetic testing
How you find out about variants
To find out about changes in the KIAA1549 gene, a lab can study DNA from a blood or saliva sample, and sometimes test tumor tissue directly. KIAA1549 genetic testing works by reading the gene’s code or looking for a KIAA1549-BRAF fusion, a change often checked in certain brain tumors.
When should I consider getting a genetic test?
There is not yet a broadly established reason for inherited KIAA1549 testing in routine care. In some people, KIAA1549 may be checked as part of tumor testing for certain brain tumors, and testing decisions are best made with a doctor or genetic counselor based on personal and family history.
A genetic result is only one part of your health story
Genetic results can provide useful insight, but how much they reveal depends on the condition and the type of variant involved. Age, medical history, lifestyle, and environment all influence how the body works over time. For some conditions, especially ones shaped by many genes, genetic information provides context rather than certainty and is most helpful when viewed alongside other parts of care. In other situations, a genetic result can offer a clear answer. In areas like medication response, genetic results can also help put individual experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body handles medicines, so the same treatment may work well for one person but less well for another. Some variants change how quickly a drug is broken down or moved through the body, while others can influence how strongly the drug acts at its target. These differences are common and can affect both benefit and the chance of side effects. Pharmacogenetic testing looks for some of these inherited differences to help explain medication response.
What is Pharmacogenetics?
Pharmacogenetics studies how differences in genes can affect the way people respond to medications. It examines relationships between genes and drugs to help explain why a treatment may work differently from one person to another. For many medicines, genes can influence both how strongly a drug works and how the body processes it. This information can support more informed, more personalized treatment decisions. You can read more about this topic in the LearnHub.
Drugs influenced by the KIAA1549 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting how someone will respond to medicines. If you have concerns about side effects, medicine interactions, or whether a treatment is right for you, talk with your doctor or pharmacist.
History
KIAA1549 first entered the scientific literature during large gene discovery projects in the 1990s, when many newly identified human genes were given temporary KIAA names. At that stage, it was mainly a cataloged sequence rather than a gene widely recognized in everyday medicine. From these first observations, research expanded steadily. Interest in the KIAA1549 gene grew much more after researchers found that part of it can join with the BRAF gene in many pilocytic astrocytomas, a type of usually slow growing brain tumor often seen in children. That finding, reported in the late 2000s, gave KIAA1549 lasting importance in tumor genetics and pathology. Since then, the gene has been recognized mainly through this fusion’s role in helping classify certain brain tumors.